# f4jumble

An implementation of the F4Jumble algorithm, an unkeyed variable-width
permutation.

F4Jumble is used by Zcash Unified Addresses and Unified Viewing Keys to
prevent certain kinds of malleation attacks, and is specified by [ZIP 316](https://zips.z.cash/zip316).

## License

Licensed under either of

 * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
   http://www.apache.org/licenses/LICENSE-2.0)
 * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)

at your option.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally
submitted for inclusion in the work by you, as defined in the Apache-2.0
license, shall be dual licensed as above, without any additional terms or
conditions.